CN108918901B - Multichannel flow path structure of biochemical multi-component concentration online analyzer - Google Patents
Multichannel flow path structure of biochemical multi-component concentration online analyzer Download PDFInfo
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- CN108918901B CN108918901B CN201810851562.5A CN201810851562A CN108918901B CN 108918901 B CN108918901 B CN 108918901B CN 201810851562 A CN201810851562 A CN 201810851562A CN 108918901 B CN108918901 B CN 108918901B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1065—Multiple transfer devices
Abstract
The invention discloses a multi-channel flow path structure of a biochemical multi-component concentration online analyzer, belonging to the technical field of fluid structures and motor drive control; the invention adopts a stepping motor pulse control mode, precisely and quantitatively injects the micro-upgrading standard liquid and the liquid to be detected into the detection pool, precisely and quantitatively injects the buffer liquid into the detection pool in a circulating way, and ensures that the liquid level of the detection pool is constant. The multi-channel flow path structure designed by the invention is respectively composed of containers such as a detection pool, a sampling pool, a cleaning pool, a standard sample pool, a buffer liquid barrel, a waste liquid barrel and the like, and auxiliary devices such as a diaphragm pump, a plunger pump, a peristaltic pump, an electromagnetic valve, a mechanical arm, a liquid transferring needle, a multi-channel connector, a pipeline and the like. The invention selects different flow paths by switching different electromagnetic valves of the switch, adopts a pulse control mode of the stepping motor to carry out liquid delivery, and accurately measures and calculates the volume flow of the fluid, thereby accurately controlling the volume of the buffer solution injected into the detection pool, and realizing the accurate positioning control of the liquid level of the detection pool and the cleaning of the loop.
Description
Technical Field
The invention relates to a multi-channel flow path structure of a biochemical multi-component concentration online analyzer, belonging to the technical field of fluid structures and motor drive control.
Background
The biochemical multi-component concentration online analyzer is mainly used for meeting the requirement of accurately acquiring multi-component concentration online and has certain research and development significance. In order to solve the problem that a pump pipe of a traditional multi-loop peristaltic pump is easy to wear, the analyzer adopts a multi-channel electromagnetic valve control mode, so that the reliability of equipment can be effectively improved, and the maintenance cost of the equipment can be effectively reduced. During an injection sampling procedure, precise delivery of the fluid volume flow is required.
Disclosure of Invention
The invention aims to provide a multichannel flow path structure of a biochemical multi-component concentration online analyzer meeting the requirements.
The technical scheme adopted by the invention is as follows: a multi-channel flow path structure of a biochemical multi-component concentration online analyzer injects standard liquid and liquid to be detected into a detection pool accurately and quantitatively by adopting a stepping motor pulse control mode, and comprises a buffer liquid barrel, a multi-channel connector I, a diaphragm pump, a two-way electromagnetic valve I, a sampler, a two-way electromagnetic valve II, a two-way electromagnetic valve III, a multi-way connector II, a peristaltic pump I, a peristaltic pump II, a standard sample pool I, a standard sample pool II, a two-way electromagnetic valve IV, a multi-channel connector III, a waste liquid barrel, a detection pool I, a plunger pump, a sampling pool, a two-way electromagnetic valve V, a two-way electromagnetic valve VI, a two-way electromagnetic valve VII, a pipetting needle, a mechanical arm, a two-way electromagnetic valve VIII, a two-way electromagnetic valve III, a multi-channel connector IV, a two-way electromagnetic valve Xbi-way electromagnetic valve II, a two-way electromagnetic valve XI, a detection pool III, multichannel connector V, washing pond.
The multichannel flow path structure takes a detection pool I, a detection pool II and a detection pool III as cores, and a port 3 of the detection pool I is connected with a port 3 of a multichannel connector V; the port 1 of the detection pool I is connected with the port 1 of the multi-channel connector III through a two-way electromagnetic valve IV; the No. 2 port of the detection pool I is connected with the No. 1 port of the multi-channel connector IV through a two-way electromagnetic valve VI; a port 3 of the detection pool II is connected with a port 2 of the multi-channel connector V; the port 1 of the detection pool II is connected with the port 2 of the multi-channel connector III through a two-way electromagnetic valve IX; the No. 2 port of the detection pool II is connected with the No. 3 port of the multi-channel connector IV through a two-way electromagnetic valve X; a port 3 of the detection pool III is connected with a port 1 of the multi-channel connector V; the port 1 of the detection pool III is connected with the port 3 of the multi-channel connector III through a two-way electromagnetic valve XI; and a port 2 of the detection pool III is connected with a port 4 of the multi-channel connector IV through a two-way electromagnetic valve XII.
The No. 3 port of the sampling pool is connected with the No. 6 port of the multi-channel connector V; the No. 1 port of the sampling pool is connected with the No. 2 port of the multi-way connector II through the peristaltic pump I; and the No. 2 port of the sampling pool is connected with the No. 5 port of the multi-channel connector IV through a two-way electromagnetic valve V.
A port 3 of the cleaning tank is connected with a port 4 of the multi-channel connector V; the No. 1 port of the cleaning pool is connected with the No. 4 port of the multi-channel connector III through a two-way electromagnetic valve VII; and a port 2 of the cleaning pool is connected with a port 2 of the multi-channel connector IV through a two-way electromagnetic valve VIII.
The No. 1 port of the multi-channel connector I is connected with the No. 1 port of the plunger pump through a diaphragm pump and a two-way electromagnetic valve III; the No. 2 port of the multi-channel connector I is directly connected with the buffer liquid barrel; the No. 3 port of the multi-channel connector I is connected with the No. 5 port of the multi-channel connector III through a peristaltic pump II; a No. 7 port of the multi-channel connector IV is connected with the waste liquid barrel through a peristaltic pump III; a port 6 of the multi-channel connector IV is connected with a port 5 of the multi-channel connector V through a two-way electromagnetic valve XIII; the No. 1 port of the multi-way connector II is connected with the sampler through a two-way electromagnetic valve II; the No. 2 port of the multi-way connector II is connected with the buffer liquid barrel through a two-way electromagnetic valve I; the No. 2 port of the plunger pump is directly connected with the liquid transferring needle; the mechanical arm is connected with the liquid transferring needle, and the liquid transferring needle is installed on the mechanical arm.
Furthermore, the working states of the diaphragm pump, the two-way electromagnetic valve I, the two-way electromagnetic valve II, the two-way electromagnetic valve III, the peristaltic pump I, the peristaltic pump II, the two-way electromagnetic valve IV, the plunger pump, the two-way electromagnetic valve V, the two-way electromagnetic valve VI, the two-way electromagnetic valve VII, the mechanical arm, the two-way electromagnetic valve VIII, the two-way electromagnetic valve IX, the peristaltic pump III, the multi-channel connector IV, the two-way electromagnetic valve X, the two-way electromagnetic valve XI, the two-way electromagnetic valve XII and the two-way electromagnetic valve XIII are all automatically controlled by electric signals and; the microcontroller system is provided by an analyzer.
Furthermore, the accurate liquid level positioning and loop cleaning of the detection pool I are realized by controlling the sequential actions of the two-way electromagnetic valve VI, the peristaltic pump III, the two-way electromagnetic valve IV and the peristaltic pump II.
Furthermore, the precise injection of the standard liquid and the liquid to be detected is realized by controlling the time sequence action of the mechanical arm and the plunger pump.
Furthermore, the cleaning of the inner wall and the outer wall of the liquid transferring needle under a fixed liquid level is realized by controlling the time sequence among the mechanical arm, the diaphragm pump, the two-way electromagnetic valve III, the peristaltic pump II, the multi-channel connector III, the two-way electromagnetic valve VII, the two-way electromagnetic valve VIII, the peristaltic pump III and the multi-channel connector IV.
Furthermore, the diaphragm pump, the peristaltic pump I, the peristaltic pump II and the peristaltic pump III are all peristaltic pumps with adjustable flow and adjustable forward and reverse rotation.
Furthermore, all the parts are connected through pipelines, and the pipelines are made of silica gel.
The invention has the following beneficial effects:
(1) this structure adopts step motor pulse control mode, with the accurate ration injection of little upgrading standard liquid and the liquid that awaits measuring to detecting pond, with the accurate ration circulation injection of buffer solution detection pond, guarantees that the detection pond liquid level is invariable.
(2) The adopted multi-channel electromagnetic valve control mode can effectively improve the reliability of the equipment and reduce the maintenance cost of the equipment.
(3) The traditional multi-loop peristaltic pump control is improved into a multi-channel electromagnetic valve control mode, so that the use of pump head BPT (pulse-width modulation) pipes can be effectively reduced, the reliability of equipment is effectively improved, and the maintenance cost of the equipment is reduced.
(4) Novel structure, convenient assembly and easy production.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a connection diagram of a multi-channel flow path structure of the biochemical multi-component concentration online analyzer of the present invention.
FIG. 2 is a front view of a detection cell I of the present invention and its peripheral piping.
Figure 3 is a top view of the robot arm disk of the present invention.
Labeled as: 1-buffer liquid barrel, 2-multichannel connector I, 3-diaphragm pump, 4-two-way electromagnetic valve I, 5-sampler, 6-two-way electromagnetic valve II, 7-two-way electromagnetic valve III, 8-multi-way connector II, 9-peristaltic pump I, 10-peristaltic pump II, 11-standard sample pool I, 12-standard sample pool II, 13-standard sample pool III, 14-two-way electromagnetic valve IV, 15-multi-way connector III, 16-waste liquid barrel, 17-detection pool I, 18-plunger pump, 19-sampling pool, 20-two-way electromagnetic valve V, 21-two-way electromagnetic valve VI, 22-two-way electromagnetic valve VII, 23-pipetting needle, 24-mechanical arm, 25-two-way electromagnetic valve VIII, 26-two-way electromagnetic valve IX, 27-peristaltic pump III, 28-multichannel connector IV, 29-two-way solenoid valve X, 30-detection pool II, 31-two-way solenoid valve XI, 32-detection pool III, 33-two-way solenoid valve XII, 34-two-way solenoid valve XIII, 35-multichannel connector V, 36-cleaning pool.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The specific connection relationship of the structural design of the present invention is described in the summary of the invention and shown in fig. 1.
All parts of the flow path structure are connected through pipelines, and the materials of the pipelines are silica gel. The capacity of the plunger pump is 500 microlitres, and the inner diameter of the pipeline is 1 millimeter.
In the invention, the working states of the diaphragm pump 3, the two-way electromagnetic valve I4, the two-way electromagnetic valve II 6, the two-way electromagnetic valve III 7, the peristaltic pump I9, the peristaltic pump II 10, the two-way electromagnetic valve IV 14, the plunger pump 18, the two-way electromagnetic valve V20, the two-way electromagnetic valve VI 21, the two-way electromagnetic valve VII 22, the mechanical arm 24, the two-way electromagnetic valve VIII 25, the two-way electromagnetic valve IX 26, the peristaltic pump III 27, the multi-channel connector IV 28, the two-way electromagnetic valve X29, the two-way electromagnetic valve XI31, the two-way electromagnetic valve XII33 and the two-way electromagnetic valve XIII34 are all automatically controlled by; the microcontroller system is provided by an analyzer.
As shown in fig. 2, the detection cell i 17 is used for detecting the concentrations of the standard solution and the solution to be detected by the electrode, and comprises: liquid inlet 1 (No. 1 port), waste discharge port 2 (No. 2 port), overflow outlet 3 (No. 3 port). The No. 1 port of the detection pool I17 is connected with a two-way electromagnetic valve IV 14; the No. 2 port is connected with a two-way electromagnetic valve VI 21; port 3 is connected to port 3 of multi-channel connector v 35.
The functional purposes of the detection pool II 30 and the detection pool III 32 are similar to those of the detection pool I17, and are not described again.
As shown in figure 3, the disc is composed of four parts, namely a detection pool, a cleaning pool, a sample injection pool and a standard sample pool, and the movement of the liquid transfer needle is controlled by the mechanical arm 24 to ensure the accurate positioning of the liquid transfer needle.
The process of injecting the standard solution in the standard sample pool I11 into the detection pool I17 is as follows: the liquid transferring needle 23 is inserted into the standard sample pool I11 by controlling the action of the mechanical arm 24, then the plunger pump 18 is controlled to act to sample, after the sampling is finished, the mechanical arm 24 is controlled to act to draw the liquid transferring needle 23 out of the standard sample pool I11, the detection pool I17 is shifted, the liquid transferring needle 23 is inserted into the detection pool I17, and then the plunger pump 18 is controlled to act to sample.
The process of injecting the standard solution in the standard sample pool II 12 and the standard sample pool III 13 into the detection pool II 30 and the detection pool III 32 respectively is similar to the process of injecting the standard solution in the standard sample pool I11 into the detection pool I17, and the positioning positions of the mechanical arms are different and are not repeated.
The process of injecting the liquid to be detected into the detection cell I17 is as follows: firstly opening the two-way electromagnetic valve II 6, then controlling the peristaltic pump I9 to act, delaying t1 time, firstly controlling the peristaltic pump I9 to stop and then closing the two-way electromagnetic valve II 6, after closing, controlling the mechanical arm 24 to insert the liquid transfer needle 23 into the sampling pool 19, then performing sampling by the action of the plunger pump 18, after sampling is completed, controlling the mechanical arm 24 to draw the liquid transfer needle 23 out of the sampling pool 19, displacing the detection pool I17 and inserting the liquid transfer needle 23 into the detection pool I17, and then controlling the plunger pump 18SY to perform sampling.
The process of injecting the liquid to be detected into the detection pool II 30 and the detection pool III 32 is similar to the process of injecting the liquid to be detected into the detection pool I17, and the processes are not repeated except that the positioning positions of the mechanical arms are different.
The cleaning process of the sampling pool 19 is as follows: firstly opening the two-way electromagnetic valve V20 and then controlling the peristaltic pump III 27 to act, delaying the time t1, firstly controlling the peristaltic pump III 27 to stop and then closing the two-way electromagnetic valve V20, after closing, firstly opening the two-way electromagnetic valve I4 and then controlling the peristaltic pump I9 to act, after the time t1, firstly opening the two-way electromagnetic valve V20 and then operating the peristaltic pump III 27, after the time t4, firstly stopping the peristaltic pump I9 and then closing the two-way electromagnetic valve I4, then at the time t1, firstly stopping the peristaltic pump III 27 and then closing the two-way electromagnetic valve V20, and finishing cleaning.
The cleaning process of the detection pool I17 is as follows: firstly opening the two-way electromagnetic valve VI 21 and then controlling the peristaltic pump III 27 to act, delaying the time t1, firstly controlling the peristaltic pump III 27 to stop and then closing the two-way electromagnetic valve VI 21, after closing, firstly opening the two-way electromagnetic valve IV 14 and then controlling the peristaltic pump II 10 to act, after the time t1, firstly opening the two-way electromagnetic valve VI 21 and then allowing the peristaltic pump III 27 to act, after the time t5, firstly stopping the peristaltic pump III 27 and then closing the two-way electromagnetic valve VI 21, and then at the time t1, firstly stopping the peristaltic pump II 10 and then closing the two-way electromagnetic valve IV 14, and finishing cleaning.
The cleaning process of the detection pool II 30 and the detection pool III 32 is similar to that of the detection pool I17, only the controlled peristaltic pump and the two-way electromagnetic valve are different, and the description is omitted.
The cleaning process of the cleaning tank 36 is as follows: the liquid transferring needle 23 is inserted into the cleaning pool 36 through the control of the mechanical arm 24, the two-way electromagnetic valve VIII 25 and the two-way electromagnetic valve III 7 are firstly opened, then the peristaltic pump III 27 and the diaphragm pump 3 are operated, the time t2 is delayed, then the peristaltic pump III 27 and the diaphragm pump 3 are stopped, the two-way electromagnetic valve III 7 and the two-way electromagnetic valve VIII 25 are closed, then the two-way electromagnetic valve VII 22 is opened, the peristaltic pump II 10 is operated, after the time t1, the two-way electromagnetic valve VIII 25 is firstly opened, then the peristaltic pump III 27 is operated, then at the time t3, the liquid transferring needle 23 is moved out of the cleaning pool 36 through the control of the mechanical arm 24, then the peristaltic pump II 10 is firstly stopped, then the two-way electromagnetic valve VII 22 is closed, after the time t1, the peristaltic pump III 27 is firstly stopped, then the two-way.
In conclusion, different flow paths are selected by switching different electromagnetic valves of the switch, liquid is conveyed in a stepping motor pulse control mode, and the volume flow of the fluid is accurately measured and calculated, so that the volume of the buffer solution injected into the detection pool is accurately controlled, the detection design requirement (3-4ml) is met, and the accurate positioning control of the liquid level of the detection pool and the cleaning of a loop are realized. The 2 stepping motors are adopted to control the diaphragm pump and the plunger pump in a pulse mode, and accurate quantitative injection and cleaning of a micro-upgrade (5-50 mu L) standard solution and a solution to be detected are achieved. The precise sample introduction and the cleaning of the inner wall and the outer wall under the fixed liquid level are realized by adopting a double-volume liquid-transferring needle and a detection circuit thereof and controlling through a mechanical arm and a plunger pump.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (7)
1. The utility model provides a biochemical multi-component concentration on-line analyzer's multichannel flow path structure, adopts step motor pulse control mode, injects standard liquid and the accurate ration of the liquid that awaits measuring into the measuring cell which characterized in that: the structure comprises a buffer liquid barrel (1), a multi-channel connector I (2), a diaphragm pump (3), a two-way electromagnetic valve I (4), a sampler (5), a two-way electromagnetic valve II (6), a two-way electromagnetic valve III (7), a multi-channel connector II (8), a peristaltic pump I (9), a peristaltic pump II (10), a standard sample pool I (11), a standard sample pool II (12), a standard sample pool III (13), a two-way electromagnetic valve IV (14), a multi-channel connector III (15), a waste liquid barrel (16), a detection pool I (17), a plunger pump (18), a sampling pool (19), a two-way electromagnetic valve V (20), a two-way electromagnetic valve VI (21), a two-way electromagnetic valve VII (22), a pipetting needle (23), a mechanical arm (24), a two-way electromagnetic valve VIII (25), a two-way electromagnetic valve IX (26), a peristaltic pump III (27), a multi-channel connector IV (28), a two-, A detection pool II (30), a two-way electromagnetic valve XI (31), a detection pool III (32), a two-way electromagnetic valve XII (33), a two-way electromagnetic valve XIII (34), a multi-channel connector V (35) and a cleaning pool (36);
the multichannel flow path structure takes a detection pool I (17), a detection pool II (30) and a detection pool III (32) as cores, and a port 3 of the detection pool I (17) is connected with a port 3 of a multichannel connector V (35); the No. 1 port of the detection pool I (17) is connected with the No. 1 port of the multi-channel connector III (15) through a two-way electromagnetic valve IV (14); the No. 2 port of the detection pool I (17) is connected with the No. 1 port of the multi-channel connector IV (28) through a two-way electromagnetic valve VI (21); the port 3 of the detection pool II (30) is connected with the port 2 of the multi-channel connector V (35); the No. 1 port of the detection pool II (30) is connected with the No. 2 port of the multi-channel connector III (15) through a two-way electromagnetic valve IX (26); the No. 2 port of the detection pool II (30) is connected with the No. 3 port of the multi-channel connector IV (28) through a two-way electromagnetic valve X (29); the port 3 of the detection pool III (32) is connected with the port 1 of the multi-channel connector V (35); the No. 1 port of the detection pool III (32) is connected with the No. 3 port of the multi-channel connector III (15) through a two-way electromagnetic valve XI (31); the No. 2 port of the detection pool III (32) is connected with the No. 4 port of the multi-channel connector IV (28) through a two-way electromagnetic valve XII (33);
the No. 3 port of the sampling pool (19) is connected with the No. 6 port of the multi-channel connector V (35); the No. 1 port of the sampling pool (19) is connected with the No. 2 port of the multi-channel connector II (8) through a peristaltic pump I (9); the No. 2 port of the sampling pool (19) is connected with the No. 5 port of the multi-channel connector IV (28) through a two-way electromagnetic valve V (20);
a port 3 of the cleaning pool (36) is connected with a port 4 of the multi-channel connector V (35); the No. 1 port of the cleaning pool (36) is connected with the No. 4 port of the multi-channel connector III (15) through a two-way electromagnetic valve VII (22); a No. 2 port of the cleaning pool (36) is connected with a No. 2 port of a multi-channel connector IV (28) through a two-way electromagnetic valve VIII (25);
the No. 1 port of the multi-channel connector I (2) is connected with the No. 1 port of the plunger pump (18) through the diaphragm pump (3) and the two-way electromagnetic valve III (7); a No. 2 port of the multi-channel connector I (2) is directly connected with the buffer liquid barrel (1); the No. 3 port of the multi-channel connector I (2) is connected with the No. 5 port of the multi-channel connector III (15) through a peristaltic pump II (10); a No. 7 port of the multi-channel connector IV (28) is connected with the waste liquid barrel (16) through a peristaltic pump III (27); the No. 6 port of the multi-channel connector IV (28) is connected with the No. 5 port of the multi-channel connector V (35) through a two-way electromagnetic valve XIII (34); the No. 1 port of the multi-channel connector II (8) is connected with the sampler (5) through a two-way electromagnetic valve II (6); the No. 2 port of the multi-channel connector II (8) is connected with the buffer liquid barrel (1) through a two-way electromagnetic valve I (4); a No. 2 port of the plunger pump (18) is directly connected with the liquid transferring needle (23); the mechanical arm (24) is connected with the liquid transferring needle (23), and the liquid transferring needle (23) is installed on the mechanical arm (24).
2. The multi-channel flow path structure of biochemical multi-component concentration online analyzer according to claim 1, characterized in that: the working states of the diaphragm pump (3), the two-way electromagnetic valve I (4), the two-way electromagnetic valve II (6), the two-way electromagnetic valve III (7), the peristaltic pump I (9), the peristaltic pump II (10), the two-way electromagnetic valve IV (14), the plunger pump (18), the two-way electromagnetic valve V (20), the two-way electromagnetic valve VI (21), the two-way electromagnetic valve VII (22), the mechanical arm (24), the two-way electromagnetic valve VIII (25), the two-way electromagnetic valve IX (26), the peristaltic pump III (27), the multi-channel connector IV (28), the two-way electromagnetic valve X (29), the two-way electromagnetic valve XI (31), the two-way XII electromagnetic valve (33) and the two-way electromagnetic valve XIII (34) are automatically controlled by electric; the microcontroller system is provided by an analyzer.
3. The multi-channel flow path structure of biochemical multi-component concentration online analyzer according to claim 1 or 2, characterized in that: the accurate liquid level positioning and loop cleaning of the detection pool I are realized by controlling the sequential actions of the two-way electromagnetic valve VI (21), the peristaltic pump III (27), the two-way electromagnetic valve IV (14) and the peristaltic pump II (10).
4. The multi-channel flow path structure of biochemical multi-component concentration online analyzer according to claim 1 or 2, characterized in that: and the precise injection of the standard liquid and the liquid to be detected is realized by controlling the time sequence actions of the mechanical arm (24) and the plunger pump (18).
5. The multi-channel flow path structure of biochemical multi-component concentration online analyzer according to claim 1 or 2, characterized in that: by controlling the time sequence among the mechanical arm (24), the diaphragm pump (3), the two-way electromagnetic valve III (7), the peristaltic pump II (10), the multi-channel connector III (15), the two-way electromagnetic valve VII (22), the two-way electromagnetic valve VIII (25), the peristaltic pump III (27) and the multi-channel connector IV (28), the cleaning of the inner wall and the outer wall of the liquid transfer needle under the fixed liquid level is realized.
6. The multi-channel flow path structure of biochemical multi-component concentration online analyzer according to claim 1, characterized in that: the peristaltic pump I (9), the peristaltic pump II (10) and the peristaltic pump III (27) are all peristaltic pumps with adjustable flow and adjustable forward and reverse rotation.
7. The multi-channel flow path structure of biochemical multi-component concentration online analyzer according to claim 1, characterized in that: each multi-channel connector is connected with other parts connected with the multi-channel connector through pipelines, and the pipelines are made of silica gel.
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